7 Piece Black Cross Triple-cornered Drill Bit Carbide Tip Spear Head

High quality materials: the multi-functional cross Triple-Cornered drill is made of high quality Cemented carbide material. Oxinitriing of the knife head strengthens the drill hardness.Unique cross angle design: low incision resistance, stable drilling, high speed, no breaking of the limit. Open neatly, smooth, no broken edges, no trembling phenomenon, easy to splinter.7 different sizes: Tile drill is suitable for your different needs. It can be installed in general electric hand drill, bench drill. The clamping range of the machine drill is 10 mm and more.Surface electrophoretic painting process: full grinding and rust protection treatment, clean and sharp without burrs. The drill bit is more wear-resistant and durable. Fully automatic polishing. Polished CNC is fully automated, each one is unified.Wide application: professional glass and tile drill bits allow smooth and accurate drilling in ceramic tiles, marble, thin iron plates, mirrors and glass. Remember to add water or coolant when drilling.Material:Cemented carbidecolour:BlackPackage Contents:7 * Triple-Cornered Cross Alloy Drill (3/4/5/6/8/10/12mm)Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.